（因难堪或生气）脸色变得绯红
If you go/turn crimson, your face becomes red because you are very embarrassed or angry.
She turned crimson with embarrassment. 她的脸因难为情而变得通红。
The woman whispered something to him and his face turned crimson.
Feeling her cheeks turning crimson, she denied that she had been with Mark.
Her father's face went crimson with rage.
I'm sure these people would go crimson if they knew that anyone can read their innermost thoughts now.
See also: crimson adjective